Umphrey’s McGee gave Madison something special for their final performance of a two-night stand when they debuted a cover of Beastie Boys’ “Sabotage” with a unique twist.Coming out for the encore, each band member filled a different role as the group pulled the ol’ switcharoo with Brendan Bayliss taking on the bass, Jake Cinninger on keys, Joel Cummins on guitar, Andy Farag on drums, Kris…